67986143 has 2 divisors, whose sum is σ = 67986144. Its totient is φ = 67986142.

The previous prime is 67986133. The next prime is 67986197. The reversal of 67986143 is 34168976.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-67986143 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 67986094 and 67986103.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (67986103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33993071 + 33993072.

It is an arithmetic number, because the mean of its divisors is an integer number (33993072).

Almost surely, 2^67986143 is an apocalyptic number.

67986143 is a deficient number, since it is larger than the sum of its proper divisors (1).

67986143 is an equidigital number, since it uses as much as digits as its factorization.

67986143 is an evil number, because the sum of its binary digits is even.

The product of its digits is 217728, while the sum is 44.

The square root of 67986143 is about 8245.3710043879. The cubic root of 67986143 is about 408.1377830657.

The spelling of 67986143 in words is "sixty-seven million, nine hundred eighty-six thousand, one hundred forty-three".